Umbrella clamp



FIG. 1 is a front, right side and top perspective view of an umbrella clamp showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right side view thereof; the left side view being a mirror image with the exclusion of the thumb-screw; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for an umbrella clamp, as shown and described. 